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结合空间信息的模糊聚类侧扫声纳图像分割

DOI: 10.11834/jig.20150702

Keywords: 模糊聚类,侧扫声纳,图像分割,组合中值滤波

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Abstract:

目的针对侧扫声纳图像具有背景复杂、噪声污染重等特点,提出一种结合空间信息的模糊聚类分割算法(FCM),以提高侧扫声纳图像的分割精度和分割速度。方法采用结合组合邻域中值滤波的FCM算法,首先选取正十字邻域和斜十字邻域,分别计算两个邻域内的像素灰度中值;然后,结合其中的较小值,引入惩罚项,得到融合灰度信息和空间信息的灰度值;最后,对融合后的灰度图像进行FCM分割。结果利用该算法对不同尺寸和不同目标的侧扫声纳图像进行分割,并将分割结果与其他5种聚类算法的分割结果进行比较,对比分析每种算法的分割精度和运算时间。结合中值滤波的FCM算法的分割精度和运算时间均优于传统的FCM算法和结合均值滤波的FCM算法,其中结合组合邻域中值滤波的FCM算法的运算速度较快,分割精度略高于结合传统中值滤波的FCM算法。结论结合组合邻域中值滤波的FCM算法在对侧扫声纳图像进行分割时,具有较强的抗噪性、实时性和较强的边缘保持能力。

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